Bent Sheet Metal Tolerances

The resulting bend angle variation and sometimes the required adjustment to the flat layout contributes to the reason that machined parts typical tolerance of 0 002 in can routinely have tighter tolerances than precision sheet metal parts typical tolerance of 0 010 in.

Bent sheet metal tolerances. Although bending is one of the final processes in sheet metal part manufacture it is relatively inaccurate compared to the other components of sheet metal processing. Maximum sheet thickness for aluminum and stainless steel is 6 mm. General tolerance iso 2768 does not specify where to use these tolerances. Maximum sheet thickness for wgw s235jr stained and oiled is 8 mm.

Maximum weight is 40 kg. Also known as press braking flanging die bending folding and edging this method is used to deform a material to an angular shape. During the rolling process the rollers bow slightly which results in the sheets being thinner on the edges. Maximum sheet thickness for corten steel bent products is 4 mm.

And for machined components iso 27 68 fh can be used. As can be seen from the above table the more times the sheet metal is bent the greater the bending tolerance. Bending is one of the most common sheet metal fabrication operations. Critical tolerances at.

Sheet metal guage tolerances. Our bending equipment consists of folders and press brakes. All bend tolerances for the entire part added together. Why can t bending be simpler.

The science of sheet metal bending has proven formulas for bend allowances and bend deductions that account for material elongation for given materials. The force must exceed the material s yield strength to achieve a plastic deformation. Geometry of tooling imposes a minimum bend dimension. Use the minimum bend dimension values in the charts below for your minimum closeness of cutout to a bend.

While both can achieve highly accurate bends each type of equipment offers its own advantages. By no means do bending tolerances need to be. This is because sheet metal bending tolerances are large especially when sheet metal has multiple bends. The tolerances in the table and attachments reflect current manufacturing practices and commercial standards and are not representative of the manufacturer s standard gauge which has no inherent tolerances.

Maximum sheet thickness for all other steel is 6 mm. Well it can be with realistic tolerancing. Fabrication tolerances for dimensional variance in sheet metal and machined parts. As per design requirements and manufacturing capability tolerance class is defined.

The diagram shows one such mechanism. In the above example m and k has defined the tolerance. Maximum dimensions are 2980 x 1200 mm. For sheet metal parts iso 27 68 mk is used.